This paper addresses the problem of color reduction which aims at computing a compact representation of a color coordinate
system. By capitalizing on studies that have suggested the existence of eleven focal colors, we conducted subjective
experiments which exploited the categorical nature of human color perception. This paper describes a novel color reduction
scheme based on human perception and graph transduction and proposes a look-up table that reduces the RGB color coordinate system into eleven salient colors. Objective results on standard datasets show improvements over previously proposed
methods.